django-registration: how do I check whether the user is logged in before displaying a page

Question

I followed this page to set up a django registration site. It's pretty awesome, and registration and authentication are nicely wrapped.

But, it doesn't show me, how do I check if a user is logged in, who this user is, before displaying a webpage? and how do I direct the user to a new page after logged in?

Thanks!

Answer 1

In a view, you can use if request.user.is_authenticated(): and the variable for the current user is request.user

In a template, you can use {% if user.is_authenticated %} and the variable for the current user is user

For redirecting a user after logging in, you can set up LOGIN_REDIRECT_URL variable in settings.py

Answer 2

In .py documents

You can either use this inside every view

if not request.user.is_authenticated:
   #do something

or this just before every view

@login_required

Remember that this one requires importing from django.contrib.auth.decorators import login_required
and you may also want to write LOGIN_URL = "/loginurl/" in your settings.py to get non-logged users redirected to an specific URL instead of the default one accounts/login )

In .html documents

{% if not user.is_authenticated %}
Login is required
{% endif %}

---

Redirecting after logging in

You can either modify LOGIN_REDIRECT_URL in settings.py

or redirect("/indexpage") after the user has been logged in.
This last one requires importing from django.shortcuts import redirect

Answer 3

You can also use a login required decorator before your view :

@login_required()

It redirects a user to the login page if a non logged in user tries to access your view

You will find more on this page : https://docs.djangoproject.com/en/dev/topics/auth/default/#topic-authorization